San Antonio Texas Mayor Julian Castro, right, and his brother Rep. Joaquin Castro, D-Texas, center, talk with Rep. Lamar Smith, R-Texas, all from San Antonio, before the beginning of the House Judiciary Committee hearing on America's Immigration System on Capitol Hill in Washington, Tuesday, Feb. 5, 2013. Mayor Castro was one of the witnesses.(AP Photo/Susan Walsh) less

San Antonio Texas Mayor Julian Castro, right, and his brother Rep. Joaquin Castro, D-Texas, center, talk with Rep. Lamar Smith, R-Texas, all from San Antonio, before the beginning of the House Judiciary ... more